What kind of oil should i put in my 1988 Chrysler fifth avenue?

For your 1988 Chrysler Fifth Avenue, it's recommended to use 10W-30 motor oil, as this viscosity provides adequate protection for the engine, especially in varying temperatures. If you live in a particularly hot or cold climate, you might consider using 10W-40 or 5W-30 for improved performance. Always check the owner's manual for any specific recommendations or requirements.